diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index fdaa1e5e3078..070dee9791a9 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -46,6 +46,7 @@ #include <linux/pipe_fs_i.h> #include <linux/splice.h> #include <linux/rcupdate_wait.h> +#include <linux/sched/mm.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> #include "internal.h" @@ -2519,6 +2520,7 @@ static int filemap_get_pages(struct kiocb *iocb, size_t count, pgoff_t index = iocb->ki_pos >> PAGE_SHIFT; pgoff_t last_index; struct folio *folio; + unsigned int flags; int err = 0; /* "last_index" is the index of the page beyond the end of the read */ @@ -2531,8 +2533,12 @@ retry: if (!folio_batch_count(fbatch)) { if (iocb->ki_flags & IOCB_NOIO) return -EAGAIN; + if (iocb->ki_flags & IOCB_NOWAIT) + flags = memalloc_noio_save(); page_cache_sync_readahead(mapping, ra, filp, index, last_index - index); + if (iocb->ki_flags & IOCB_NOWAIT) + memalloc_noio_restore(flags); filemap_get_read_batch(mapping, index, last_index - 1, fbatch); } if (!folio_batch_count(fbatch)) { |